HELAC-PHEGAS: automatic computation of helicity amplitudes and cross sections
Abstract
HELAC-PHEGAS is a FORTRAN based package that is able to compute automatically and efficiently tree-order helicity amplitudes and cross sections for arbitrary scattering processes within the standard electroweak theory and QCD. The algorithm for the amplitude computation, HELAC, exploits the virtues of the Dyson-Schwinger equations. The phase-space generation algorithm, PHEGAS, constructs all possible kinematical mappings dictated by the amplitude under consideration. Combined with mutichannel self-optimized Monte Carlo integration it results to efficient cross section evaluation.
Keywords
Cite
@article{arxiv.hep-ph/0012004,
title = {HELAC-PHEGAS: automatic computation of helicity amplitudes and cross sections},
author = {Aggeliki Kanaki and Costas G. Papadopoulos},
journal= {arXiv preprint arXiv:hep-ph/0012004},
year = {2009}
}
Comments
4 pages, LaTeX, to appear in the proceedings of the VII International Workshop on Advanced Computing and Analysis Technics in Physics Research, ACAT 2000, Fermilab, October 16-20, 2000